Dont know about using it for biofilter material there are definitly cheaper options, but it sure is good at getting the crud off my fridge handles!

RadleyMiller;495859; said:http://frugalliving.about.com/gi/dy...=frugalliving&zu=http://www.xtremesponge.com/
they are identical to the mr clean sponge and say that they contain no chemicals. I was thinking about taking one and putting it in a bucket to see if it does anything over time but the only ones I have are the Car ones and they might have something in them. or they might just cost a dollar more a sponge because they are for cars and have a picture of a car on the box. Well, i work tommorow so if none of the Goldfish or Cichlids are dead, then it was safe. I hope.
http://www0.epinions.com/content_152645504644 said:I had to do some digging to find information regarding this product. Nowhere did I locate an ingredients list. However, I learned much more than I expected during my research.
There are the usual cautions: Keep out of reach of children. Keep out of reach of toddlers and pets to avoid accidental ingestion. Do not use on skin or other parts of the body. Using on skin will likely cause abrasions. Also, If using for dishwashing, rinse dishes thoroughly. Do not use with chlorine bleach.
The manufacturer recommends testing this product in an inconspicuous spot with light pressure to see if surface may scratch or dull. Do not use this product on polished, glossy, brushed, satin, dark or faux surfaces or finishes.
The Material Safety Data Sheet (MSDS) says that this product is non-toxic. It further says, Blockage of the gastrointestinal tract may occur if swallowed.
Eye Contact: Dust from foam may cause mechanical irritation.
Skin: Dust from foam may cause mechanical irritation.
Inhalation: Dust from foam may cause irritation of the respiratory track.
Ingestion: If the sponge is ingested, contact a physician or veterinarian immediately. Intestinal blockage may be life threatening to some household pets.
Eye Contact: In case of eye irritation, flush thoroughly with water for 15 minutes. If irritation persists, seek medical advice.
Skin: In case of skin irritation, flush affected area thoroughly with water and apply a cold compress. If irritation persists, seek medical advice.
Inhalation: If respiratory irritation occurs, move from the site of exposure to an area with fresh air. If irritation persists, seek medical advice.
Store in a cool, dry, well-ventilated area.
RadleyMiller;495863; said:A recent television broadcast may have raised concerns about an ingredient in Magic Eraser. Be assured Mr. Clean Magic Eraser is completely safe when used according to directions, and poses no health risks or safety concerns.
Here are some facts about the ingredients used in Magic Eraser:
# The ingredients in Magic Eraser have been safely and commonly used for many years in a wide range of household products.
# Formaldehyde is not and has never been an ingredient in Magic Eraser. One ingredient in Magic Eraser (formaldehyde-melamine-sodium bisulfite copolymer) contains the word "formaldehyde" in its chemical name. However, this ingredient is not formaldehyde and poses no health or safety risks. (Think of this name like "sodium chloride", which is table salt. Sodium by itself can be dangerous, but sodium chloride - salt - is safe.).
# Magic Eraser is considered non-toxic. As with any sponge-like product, when swallowed this product may block the gastrointestinal tract. Therefore, we do advise to keep this product out of the reach of children and pets to avoid accidental ingestion - it is not a toy.
# It is possible that formaldehyde may be present in minute, trace amounts as a result of the manufacturing process. Even then, the amount present is significantly lower than standards established by governmental agencies and trade associations, and is actually less than what is found in indoor air.
# In fact, no ingredients in Magic Eraser are subject to any health-related labeling laws in North America or in the European Union.
We hope you find this information reassuring. You can continue to use Mr. Clean Magic Eraser with full confidence in its performance and safety for you and members of your family.
and is it just me, or is Mr. Clean a creepy guy. Honestly, I would rather use the Mr. T Magic Eraser than the Mr. Clean Magic Eraser. But thats just me.